Vs. hittable pitcher (BAA > .260)
1.51× HR rate
98 yes / 408 no · 81 HRs
Vs. pull-fly-ball-prone pitcher (>18%)tonight
+45%
365 yes / 134 no · 79 HRs
Vs. high-xwOBA pitcher (xwOBA allowed > .340)
+29%
104 yes / 399 no · 80 HRs
Platoon advantage (LHB-vs-RHP or RHB-vs-LHP)
+28%
105 yes / 257 no · 59 HRs
Opposing starter's recent FB velo down ≥1 mphtonight
+28%
73 yes / 358 no · 73 HRs
Vs. short-leash starter (avg IP < 5.0)
+27%
211 yes / 284 no · 79 HRs
First-pitch temperature > 78°F
+25%
105 yes / 380 no · 79 HRs
HR-suppressing park (factor ≤ 0.95)
−25%
320 yes / 185 no · 81 HRs
HR-friendly park (factor ≥ 1.10)
+23%
53 yes / 452 no · 81 HRs
Hot streak (L5 avg EV > career baseline)tonight
−22%
223 yes / 279 no · 80 HRs
3rd time through order vs starter
+22%
228 yes / 279 no · 81 HRs
No rest day (B2B or doubleheader)tonight
+22%
399 yes / 107 no · 81 HRs
Summer game (Jun-Aug)
+21%
230 yes / 277 no · 81 HRs
// LIFT = P(HR | factor true) ÷ P(HR | factor false), Bayesian- shrunk with K=30 pseudo-games. Significance requires |lift − 1| ≥ 0.20 AND smaller cohort n ≥ 15. Cohort = top 60 HR hitters, last 2 seasons. Refreshed weekly. Green/red = the factor's effect on tonight's HR chance; gray = not in play tonight.